Cone Heads are constructed from tungsten and are perfect for creating sculpin, minnow, and zonker patterns. They feature a counter-drilled back end to help the cone slide around the hook shank and over the hook barb, while the other side is small enough not to slide over the hook eye. Tungsten Cone Heads add weight without increasing size. Recommended cone size to hook size: Small #8-#10 Medium #4-#8 Med/Large #2-#6 Large #1-#4 The holes are 1.5 mm on the small and medium. 2.0 mm on med/large and large.